Detailed Weather Data for Project: BIGH

Date Time TAIR WSPD RELH SRAD 05Mar2018 8 a.m. 48.83 19.80 75.51 13.60 05Mar2018 9 a.m. 44.60 16.00 62.99 236.80 05Mar2018 10 a.m. 46.71 16.40 52.05 498.10 05Mar2018 11 a.m. 47.64 18.90 44.72 658.70 05Mar2018 12 p.m. 48.78 16.80 40.90 766.00 05Mar2018 1 p.m. 51.03 15.60 32.27 816.60 05Mar2018 2 p.m. 53.35 17.30 19.45 789.60 05Mar2018 3 p.m. 54.10 15.60 16.07 697.60 05Mar2018 4 p.m. 54.59 15.90 13.05 545.80 05Mar2018 5 p.m. 54.32 14.80 12.58 344.00 05Mar2018 6 p.m. 52.97 15.10 13.34 113.00 05Mar2018 7 p.m. 35.47 14.30 40.86 1.50 05Mar2018 8 p.m. 47.68 3.40 19.34 0.00 05Mar2018 9 p.m. 44.51 0.50 24.28 0.00 05Mar2018 10 p.m. 39.99 0.20 39.18 0.00 05Mar2018 11 p.m. 38.14 0.40 38.26 0.00 06Mar2018 12 a.m. 36.59 1.30 39.51 0.00 06Mar2018 1 a.m. 38.34 3.00 32.96 0.00 06Mar2018 2 a.m. 38.41 3.30 33.11 0.00 06Mar2018 3 a.m. 36.72 2.50 34.86 0.00 06Mar2018 4 a.m. 36.16 2.20 35.65 0.00 06Mar2018 5 a.m. 37.67 6.20 32.02 0.00 06Mar2018 6 a.m. 38.77 8.00 28.11 0.00 06Mar2018 7 a.m. 37.27 5.90 29.92 0.70 Accuml. Values 1062.62 233.40 810.99 5482.00 Num. Valid Values 24 24 24 24 Avg. Values 44.28 9.72 33.79 228.42 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 6.82 375.54 33.79 471.34 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6621 definition: xcompl = 1 - (RELH_avg/100) TdC = -8.1797 definition: TdC = TAIR_avg - ((14.55 + (0.114*TAIR_avg))*xcompl +pow((2.5 + 0.007*TAIR_avg)*xcompl, 3) + (15.9 +0.117*TAIR_avg)*pow(xcompl, 14)) del_lambda1 = 0.5082 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4918 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.2115 definition: Qn = 0.00714*SRAD_avg + 0.00000526*SRAD_avg*pow(TAIR_avg+17.8, 1.87) +0.00000394*pow(SRAD_avg, 2) - 0.00000000239*pow(SRAD_avg, 2)*pow(TAIR_avg-7.2, 2) - 1.02 es_ea = 6.6242 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 7.9672 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.239 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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